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Multidisciplinary design optimisation of a fully electric regional aircraft wing with active flow control technology

Published online by Cambridge University Press:  28 October 2021

V. Mosca Open the ORCID record for V. Mosca [Opens in a new window] ,
S. Karpuk ,
A. Sudhi ,
C. Badrya  and
A. Elham
V. Mosca*
Affiliation:
Institute of Aircraft Design and Lightweight Structures, Technische Universität Braunschweig, Cluster of Excellence SE2A – Sustainable and Energy-Efficient Aviation, Braunschweig, Germany
S. Karpuk
Affiliation:
Institute of Aircraft Design and Lightweight Structures, Technische Universität Braunschweig, Cluster of Excellence SE2A – Sustainable and Energy-Efficient Aviation, Braunschweig, Germany
A. Sudhi
Affiliation:
Institute of Fluid Mechanics, Technische Universität Braunschweig, Cluster of Excellence SE2A – Sustainable and Energy-Efficient Aviation, Braunschweig, Germany
C. Badrya
Affiliation:
Institute of Fluid Mechanics, Technische Universität Braunschweig, Cluster of Excellence SE2A – Sustainable and Energy-Efficient Aviation, Braunschweig, Germany
A. Elham
Affiliation:
Institute of Aircraft Design and Lightweight Structures, Technische Universität Braunschweig, Cluster of Excellence SE2A – Sustainable and Energy-Efficient Aviation, Braunschweig, Germany
*
Email: v.mosca@tu-braunschweig.de
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Abstract

The German research Cluster of Excellence SE2A (Sustainable and Energy Efficient Aviation) is investigating different technologies to be implemented in the following decades, to achieve more efficient air transportation. This paper studies the Hybrid Laminar Flow Control (HLFC) using boundary layer suction for drag reduction, combined with other technologies for load and structural weight reduction and a novel full-electric propulsion system. A multidisciplinary design optimisation framework is presented, enabling physics-based analysis and optimisation of a fully electric aircraft wing equipped with HLFC technologies and load alleviation, and new structures and materials. The main focus is on simulation and optimisation of the boundary layer suction and its influence on wing design and optimisation. A quasi three-dimensional aerodynamic analysis is used for drag estimation of the wing. The tool executes the aerofoil analysis using XFOILSUC, which provides accurate drag estimation through boundary layer suction. The optimisation is based on a genetic algorithm for maximum take-off weight (MTOW) minimisation. The optimisation results show that the active flow control applied on the optimised geometry results in more than 45% reduction in aircraft drag coefficient, compared to the same geometry without HLFC technology. The power absorbed for the HLFC suction system implies a battery mass variation lower than 2%, considering the designed range as top-level requirement (TLR).

Keywords

multidisciplinary design optimisationactive flow controlboundary layer suctionelectric regional aircraftaircraft design
Type
Research Article
Information
The Aeronautical Journal , Volume 126 , Issue 1298 , April 2022 , pp. 730 - 754
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Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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